How to display node/add/sometype form on another page?

Question

The whole problem is following:

Lets say we have Items, Items can have Bids, Items can have Questions and Question can have Answer.

When an Item is displayed

Answer 1

// Drupal 7    
// Embed node creation form on a custom page inside module.
module_load_include('inc', 'node', 'node.pages');
$form = node_add('node_machine_name'); 
return drupal_render($form);